24 I/O PORTS (GPIO)
S1C33L26 TECHNICAL MANUAL
Seiko Epson Corporation
24-27
P0[7:4] Port Function Select Register (PMUX_P0_47)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
P0[7:4] Port
Function Select
Register
(PMUX_P0_47)
0x300801
(8 bits)
D7–6 CFP07[1:0] P07 port function select
CFP07[1:0]
Function
0x0 R/W Write-protected
0x3
0x2
0x1
0x0
PWM_L
I2S_MCLK
#SRDY0
P07
D5–4 CFP06[1:0] P06 port function select
CFP06[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
PWM_H
I2S_SCLK
SCLK0
P06
D3–2 CFP05[1:0] P05 port function select
CFP05[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
T16A_ATMB_0
I2S_WS
SOUT0
P05
D1–0 CFP04[1:0] P04 port function select
CFP04[1:0]
Function
0x0 R/W
0x3
0x2
0x1
0x0
T16A_ATMA_0
I2S_SDO
SIN0
P04
The GPIO pins are shared with the peripheral module pins. This register is used to select how the pins are used.
D[7:6]
CFP07[1:0]: P07 Port Function Select Bits
0x3 (R/W): PWM_L (T16P)
0x2 (R/W): I2S_MCLK (I2S)
0x1 (R/W): #SRDY0 (FSIO Ch.0)
0x0 (R/W): P07 (GPIO) (default)
D[5:4]
CFP06[1:0]: P06 Port Function Select Bits
0x3 (R/W): PWM_H (T16P)
0x2 (R/W): I2S_SCLK (I2S)
0x1 (R/W): SCLK0 (FSIO Ch.0)
0x0 (R/W): P06 (GPIO) (default)
D[3:2]
CFP05[1:0]: P05 Port Function Select Bits
0x3 (R/W): T16A_ATMB_0 (T16A5 Ch.0)
0x2 (R/W): I2S_WS (I2S)
0x1 (R/W): SOUT0 (FSIO Ch.0)
0x0 (R/W): P05 (GPIO) (default)
D[1:0]
CFP04[1:0]: P04 Port Function Select Bits
0x3 (R/W): T16A_ATMA_0 (T16A5 Ch.0)
0x2 (R/W): I2S_SDO (I2S)
0x1 (R/W): SIN0 (FSIO Ch.0)
0x0 (R/W): P04 (GPIO) (default)